Feed-water heater.



W. A. GIBSON.

' FEED WATER HEATER.

APPLICATION HLED June. 1914. RENEWED AUG-17.19M-

1,259,615, Patentad Mar. 19,1918.

IJNITED %TATE% PATENT @FFIQE.

WILLIAM A. GIBSON, 0F PEORIA, ILLINOIS, ASSIG'NOR TO WILLIAM E. HEARST,OF PEORIA, ILLINOIS.

FEED-WATER HEATER.

Specification of Letters Patent.

Patented Mar. 19, 1918.

Application filed July 80, 1914, Serial No. 854,019. Renewed August 17,1917. Serial No. 186,823.

To all whom it may concern:

Be it lmown that I, VILLIAM A. GIBSON, a citizen of the United States,residing at Peoria, in the county of Peoria and State of Illinois, haveinvented certain new and useful Improvements in Feed-Water I-Ieaters, ofwhich the following is a specification.

This invention relates to improvements in feed water heaters forboilers, in which the water to be supplied to the boiler is passed incontact with steam heating elements for raising the temperature of thewater before its admission to the boiler.

The object of my invention is to provide a heater of simple constructionin which the steam, after passage through the steam heating elements, isexhausted directly into the water previous to its introduction into theheater, thereby preventing waste of steam and also utilizing all theheating properties of the steam to raise the temperature of the water.

A. further object is the introduction of steam into the water duct insuch a manner that it will tend to force the water through the heater.

In the accompanying drawings which illustrate my invention Figure 1 is aside view'of the heater, a portion thereof being broken out of thecenter to allow an en larged view to be shown, a portion of the waterfeed pipe also being broken away at the point where the steam from theheater is delivered thereto so as to show the structure for introducingthe steam to the water duct; Fig. 2 is a vertical longitudinal sectionalview through the heater shown in Fig. l; and Fig. 3 is a partial view ofa locomotive showing the manner of applying my heater thereto.

In the drawings 1 and 2 are end fittings which are connected and spacedapart by means of the tube 3, secured to said fittings. Extendingentirely through the fittings 1 and 2 and the tube 3 is a tube 4 whichis of somewhat less diameter than the tube 3 so as to provide a narrowannular passage way 5, for water, between the tubes 3 and 4. This tube 4is swaged or expanded at each end so as to provide a tight joint withthe fitting 1 and a tight joint with the plate 6 which is bolted to thefitting 2 andforms a closure for the end of said fitting. Extendinglengthwise within the tube 4 and placed at the top thereof, is the tube8 which is of considerably smaller diameter than the tube 4 so as toallow a large space between the tubes 4 and 8 for the passage andexpansion of steam as hereinafter explained. The tube 8 at one endextends through and is secured to the head 9, which said head is boltedto the fitting 1 and forms a closure for the tube 4. The other end ofthe tube 4 is closed by means of the head 11 which is secured in contactwith the plate 6 by means of the bolts 7 which pass through the head 11and the plate 6. The intermediate plate 6 is provided at one end of theheater to facilitate replacement of the tube 4. As is apparent, whenthis tube 4 is to be replaced the swaged end of the tube 4, whichengages the end fitting 1, is turned in by means of a chisel orotherwise so as to be released from the fitting 1 and the removal ofplate 6 will. then withdraw the tube 4 from the heater.

The tube 8 terminates a short distance from the head 11 so as to providean outlet therefrom into the larger tube 4 and this said end of the tube8 is supported by means of a stem 12 which is secured to the head 11 andengages the inner surface of the tube 8. The tube 8 has a small opening10 in the bot tom thereof adjacent the head 9 for dis charging the waterfrom the pipe 8 which results from the condensation of steam therein.

13 (in Fig. 3) represents an injector or pump which is commonly used toforce water into the boiler and the water feed pipe 14 therefrom isconnected to the under side of the fitting 1 so as to communicate withthe interior thereof and there is a pipe 15 connected to the fitting 2at the bottom thereof which communicates through the check valve 24 withthe boiler so that the water supplied by the injector 13 passes throughthe pipe 14 into the fitting 1 and is then passed in a narrow streamthrough the annular opening 5 to the interior of the fitting 2, thencethrough the pipe 15 into the boiler.

A pipe 16 is connected to the steam dome 17 of the boiler and isconnected with the protruding end of the pipe 8 to supply steam to theheater, and the tube 18 is connected with the head 9 to provide anoutlet from the tube 4 of the heater and this pipe is con nected throughthe check valve 23 and 20. with the feed water pipe 14 at a point ust"Water through the heater into the boiler,

the valve 22 being opened steam will enter the tube 8 and pass from theend of said tube into the tube 4:, in which it is allowed to expand. Th;tube 4 presents a large surface to the water within the heater and byreason of the tube 8 being located within the tube 4 any heat from thetube 8 tends to raise the temperature of the steam within the tube 4,which acts upon the water in the heater and there is therefore no heatwasted in the passage of the steam through the heater. The exhaustedsteam from the heater through the pipe 18 into the chamber 21 of the T20 and is forced into the water within the pipe 14 as it passes throughthe nozzle 19. This injection of the steam into the water not only heatsthe water but cooperates with the injector 13 to force the water throughthe heater.

It will be observed therefore that I have not only constructed theheater so that there isno possible waste of heat in the passage of steamtherethrough, but I have also applied the steam exhausted from theheater for the purpose of raising the temperature of the water and alsoutilize the pressure of the escaping steam to assist in forcing thewater through the heater.

What I claim is:

1. In a device of the class described, the

combination of a heater provided therein with a passageway for steam anda passageway for water surrounding the steam passageway, and means forintroducing the steam after passing through the steam passageway andhaving its pressure and temperature lowered into the water flowing tothe water passageway anterior to its delivery to said passageway.

2. In a device of the class dearibed, the

combination of a heater provided therein with a passageway for steam anda passageway for water surrounding the steam passageway, an inlet to andan outlet from said water passageway. and means for introducmg the steamafter passing through the steam passageway and having itspressure andtemperature lowered into the inlet anterior to its connection to thewater passageway. r

3., Ina device of the class described, the combination of v a heaterprovided therein passes with a passageway for steam and a passageway forwater surrounding the steam passageway, an inlet pipe leading to thewater passageway and provided with 'a water delivery nozzle anterior toits connection to said passageway, a steam chamber surrounding saidnozzle and an exhaust pipe from the steam passageway opening into saidsteam chamber. 1. In a device of the class described,; the combinationof a heater provided therein with a passageway for steam and apassageway for water surrounding the steam passageway, an inlet pipe andan outlet pipe at opposite ends of the water passageway, a reducingnozzle forming a part ofthe inlet pipe exterior to the heater and inadvance of the inlet end of the water passageway for forcing waterthrough the inlet pipe, a

steam chamber encircling said nozzle and 85 communicating with the inletpipe, and an exhaust pipe from the steampassageway to said steamchamber. 7 V

5. In a device of the class described,- the combination of a heaterprovided therein; with a return passageway for steam, a passageway forwater entirely surrounding the steam passageway to provide for anexchange of heat between the steam and water, an outlet pipe and aninletpipe at opposite ends of the water passageway, and a pipe 7 connectingthe return end of the steam passageway to the water inlet pipe inadvance of its connection to the water passageway.

6. In a device'of theclass described, the 100 combination of aheaterprovided therein with a return passageway for steam, a passagewayfor water entirely surrounding the steam passageway to provide for anexchange of heat between the steamand water,

connection to the water passageway, and

means in the inlet pipe at thepoint of connection with the steam pipefor forcing water into the heater and causing the steam of reducedtemperature delivered thereto to commingle with the flowing water.

7. In a device of the class described, the combination of a heaterprovided therein with a tortuous passageway for steam having an inlet atone end and an outlet at its 010- posite end, a passageway for waterentirely surrounding the steam passageway tcprovide for an exchange ofheat between the steam and water, a water inlet pipe and a water outletpipe at opposite ends of the water passageway, and a connection betweenthe outlet end of the steam passageway and the water inlet pipe inadvance of its opening into the water passageway to convey steam ofreduced temperature to the entering water.

8. In a device of the class described, the combination of a heaterprovided therein with a relatively long steam passageway longitudinallydivided to cause the steam to move from end to end and return, apassageway for water entirely surrounding the steam passageway, a waterinlet pipe to and a water outlet pipe from said water passageway, and apipe connecting the return end of the steam passageway with the waterinlet pipe in advance of its connection to the water passageway.

9. In device of the class described, the combination of a heaterprovided therein with a relatively long steam passageway comprising anouter tubular member closed at one end surrounding an inner tubularmember opening into the outer tubular member near its closed end, awater passageway encircling the steam passageway from end to endthereof, a water inlet pipe and a. water outlet pipe at opposite ends ofthe water passageway, a steam outlet pipe extending from the outertubular member of the steam passageway to the water inlet pipe inadvance of its connection to the water passageway to introduce steam ofreduced temperature into the water entering the heater, and a steaminlet pipe connected to the inner tubular member of the steampassageway.

10. In a device of the class described, the combination of a heatercomprising a longi tudinal casing, a steam passageway extendingtherethrough from end to end formed of an outer tubular member withclosed ends having a steam outlet through one end, and an inner paralleltubular member near the top of the outer member extending through one orthe closed ends and terminating near the, other end, an annular waterpassageway entirely surrounding the steam passageway, a water inlet pipeand a water outlet for the water passageway, a steam inlet con nected tothe inner tubular member of the steam passageway, and a steam outletleading from the outer tubular member to the water inlet pipe andopening into the same in advance of its connection to the waterpassageway.

In testimony whereof I have affixed my signature in presence of twoWitnesses.

WILLIAM A. GIBSON. lVitnesses:

MARY E. CoMnGYs, H. V. GIBSON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner 01 Patents, Washington, D. 0.

